|
|---|
Category:MEETING MINUTES & NOTES--CORRESPONDENCE
MONTHYEARML20129J5741996-11-0505 November 1996
Trip Rept of 961001-03 Visit to Omega Point Labs in San Antonio,Tx to Witness Three Fire Endurance Tests Conducted for PG&E
ML20035B4531993-03-18018 March 1993
Summary of Operator Reactors Events Briefing 93-10 on 930317.List of Attendees Encl
ML20011F6111990-02-28028 February 1990
Summary of Operating Reactors Events Meeting 90-05 on 900228
ML20006E7251990-02-12012 February 1990
Summary of Operating Reactors Events Meeting 90-03 on 900207.List of Attendees & Viewgraphs Encl
ML20005E8421989-12-27027 December 1989
Summary of Operating Reactor Events Meeting 89-045 on 891227.List of Attendees & Significant Elements Discussed Encl
ML20005D8121989-12-18018 December 1989
Summary of Operating Reactors Events Meeting 89-044 on 891213.List of Attendees & Viewgraphs Encl
ML19332G0601989-12-0707 December 1989
Summary of Operating Reactors Events Meeting 89-43 on 891206.On 891128,high Cycle Fatigue Failure of Master Connecting Rod Assembly Occurred at South Texas,Unit 2.RHR Leakage Noted on 891201 at Braidwood,Unit 1
ML20247R0161989-09-21021 September 1989
Summary of Operating Reactors Events Meeting 89-34 on 890920 to Brief Senior Managers & Regional Offices on Selected Events That Occured Since Last Meeting
ML20247E3641989-09-0606 September 1989
Summary of 890717 Meeting W/Numarc,B&W Owners Group & Representatives of Lead Plants Re Status of STS Amends & Outstanding Issues Associated W/Lead Plant STS Submittals
ML20247D5291989-09-0505 September 1989
Summary of Operating Reactors Events Meeting 89-31 on 890830.Significant Event for Input Into NRC Performance Indicator Program Identified
ML20246K2171989-08-24024 August 1989
Summary of Operating Reactors Events Meeting 89-30 on 890823 Re Reactor Trip W/Multiple Instrumentation & Equipment Failures at DC Cook Unit 2 on 890814 & Auxiliary Feedwater Flows at Hb Robinson
ML20247K2471989-08-24024 August 1989
Trip Rept of Staff 890718-19,21 & 0801-02 Visits to Nuclear Power Plants to Gather Info Re Industry Actions to Address Loss of Oil Malfunctions of Rosemount Models 1153 & 1154 Transmitters
ML20245F9261989-08-0707 August 1989
Summary of 890613-15 Meetings W/Util in San Francisco,Ca Re PRA long-term Seismic Program.List of Attendees & Agenda Encl
ML20245G5421989-08-0303 August 1989
Summary of Operating Reactors Events Meeting 89-28 on 890802.List of Attendees,Events Discussed & Significant Elements of Events & Summaries of Reactor Scrams for Wks Ending 890723 & 30 Encl
ML20248B5171989-08-0303 August 1989
Summary of 890725 Interface Meeting W/Util in Birrmingham,Al Re Sonopco/Util Corporate Organization Including Generic Activities & Initiatives Re Plants.Agenda & Viewgraphs Encl
ML20246P7771989-07-13013 July 1989
Summary of Operating Reactors Events Meeting 89-26 on 890712.Events Discussed & Significant Elements of Events Presented in Encl 2.List of Attendees Also Encl
ML20246F8691989-06-22022 June 1989
Summary of Operating Reactors Events Meeting 89-24 on 890621.On 890615,potential Unmonitored Primary Coolant Release Path to Environ Discovered at WPPSS-2.On 890617,loss of Offsite Power Occurred at Brunswick,Unit 2
ML20245G6411989-06-15015 June 1989
Summary of Operating Reactors Events Meeting 89-23 on 890614.On 890607,multiple Electrical Distribution Sys Problems Occurred at Oconee,Units 1,2 & 3.On 890610,unit Power Signal Caused Scram
ML20245F2221989-06-0808 June 1989
Summary of Operating Reactors Events Meeting 89-21 on 890531.List of Attendees & Related Info Encl
ML20245A3851989-05-30030 May 1989
Summary of Operating Reactors Events Meeting 89-20 on 890524.List of Meeting Attendees & Viewgraphs Encl
ML20247M7961989-05-24024 May 1989
Summary of 890502 Meeting W/Util,Sargent & Lundy & Rl Cloud Assoc in Rockville,Md Re Nonlinear Piping Analyses Used to Justify Removal of Snubbers & Pipe Supports.List of Attendees & Presentation by Licensee & Contractors Encl
ML20247K0901989-05-23023 May 1989
Summary of 890517 Meeting W/Inpo Re Similarities & Differences Between Performance Indicator Programs.Detailed Discussion Encl
ML20247J6991989-05-19019 May 1989
Summary of 890501 Meeting w/C-E Owners Group in Rockville,Md Re Diverse Emergency Feedwater Actuation Sys,Per 10CFR50.62 Requirements.List of Meeting Attendees & Viewgraphs Encl
ML20247J7051989-05-19019 May 1989
Summary of 890501 Meeting w/C-E Owners Group in Rockville,Md Re Diverse Emergency Feedwater Actuation Sys,Per 10CFR50.62 Requirements.List of Meeting Attendees & Viewgraphs Encl. Record Copy
ML20247D3441989-05-16016 May 1989
Summary of Operating Reactors Events Meeting 89-19 on 890510.List of Attendees,Events Discussed & Significant Elements of Events & Rept of long-term Followup Assignments & Summary of Scrams for Wk Ending 890507 Encl
ML20247K1011989-05-16016 May 1989
Summary of 890517 Meeting W/Inpo in Bethesda,Md Re Similarities & Differences Between INPO & NRC Performance Indicators
ML20246L7281989-05-0505 May 1989
Summary of 890503 Meeting W/Util in Rockville,Md Re Containment Vessel Structural Integrity Tech Specs for Plants.List of Attendees & Licensee Presentation Encl
ML20246C3261989-05-0404 May 1989
Summary of Operating Reactors Events Meeting 89-18 on 890503
ML20246B5161989-04-28028 April 1989
Summary of 890419 Operating Reactors Events Meeting 89-16. List of Attendees & Handouts Encl
ML20248K3761989-04-10010 April 1989
Summary of Operating Reactors Events Meeting 89-014 on 890405.List of Attendees,Events Discussed & Significant Elements of Events & Summary of Reactor Scrams for Wk Ending 890402 Encl
ML20247F1991989-03-24024 March 1989
Summary of Operating Reactors Events Meeting 89-12 on 890322.List of Attendees,Events Discussed & Significant Elements,Summary of Reactor Scrams & Comparison of Weekly Statistics W/Industry Averages for Wk Ending 890319 Encl
ML20247A8971989-03-16016 March 1989
Summary of Operating Reactors Events Meeting 89-11 on 890315.List of Attendees,Events Discussed & Significant Elements of Events & Four Events Identified for Input to NRC Performance Indicator Program & Summary of Scrams Encl
ML20246N9201989-03-16016 March 1989
Summary of Operating Reactors Events Meeting 89-010 on 890308.List of Attendees,Significant Events Identified for Input to NRC Performance Indicator Program & Summary of Reactor Scrams for Wk Ending 890305 Encl
ML20245H8011989-02-23023 February 1989
Summary of Operating Reactors Events Meeting 89-08 on 890222.Attendee List & Events Discussed & Significant Elements of Events Encl
ML20235M1671989-02-17017 February 1989
Summary of Operating Reactors Events Meeting 89-07 on 890215.List of Attendees,List of Events Discussed,Summary of Events for Long Term Followup or Input to NRC Performance Indicator Program & Summary of Reactor Scrams Encl
ML20196B9821988-12-0101 December 1988
Summary of Operating Reactors Events Meeting 88-47 on 881129.List of Attendees,Events Discussed & Significant Elements of Events,Two Events Suggested for long-term Followup & Summary of Reactor Scrams Encl
ML20206L9831988-11-25025 November 1988
Summary of Operating Reactors Events Meeting 88-45 on 881115.List of Attendees & Handouts Encl
ML20195H0271988-11-25025 November 1988
Summary of Operating Reactor Events Meeting 88-46 on 881122
ML20206E3591988-11-10010 November 1988
Summary of Operating Reactors Events Meeting 88-44 on 881108.List of Meeting Attendees,Significant Events & Summary of Reactor Scrams Encl.One Significant Event Identified for Input to Performance Indicator Program
ML20205H7521988-10-18018 October 1988
Summary of Operating Reactors Events Meeting 88-41 on 881018.No Significant Events Identified for Input to NRC Performance Indicator Program
ML20207M0771988-10-0505 October 1988
Summary of Operating Reactors Events Meeting 88-39 on 881004.List of Attendees & Viewgraphs Encl
ML20207K9461988-10-0404 October 1988
Summary of 880830 Meeting W/Util in Rockville,Md Re Fire protection-related Issues.Draft Fire Protection Engineering Evaluation, Cables on Svc Bldg Outside Wall & List of Attendees Encl
ML20245D8411988-09-28028 September 1988
Summary of Operating Reactors Events Meeting 88-38 on 880927 Re Events Which Occurred Since Last Meeting on 880920
ML20155B8231988-09-20020 September 1988
Summary of Operating Reactors Events Meeting 88-37 on 880920.Info Encl Includes rept-to-date of long-term Followup Assignments & Summary of Reactor Scrams
ML20154F7971988-09-15015 September 1988
Summary of 880901 QA Meeting W/Util in Rockville,Md to Discuss Rev 2 of Util Operational QA Plan for Plants.Agenda & List of Participants Encl
ML20154N4471988-09-0707 September 1988
Summary of Operating Reactors Events Meeting 88-036 on 880906 Re Events Which Occurred Since Last Meeting on 880830.List of Attendees Encl
ML20153G6331988-08-30030 August 1988
Summary of Operating Reactor Events Meeting 88-35 on 880830, Including Summary of Reactor Scrams for Wk Ending 880828. Significant Event Identified for Input to NRC Performenance Indicator Program
ML20153C1861988-08-23023 August 1988
Summary of Operating Reactors Events Meeting 88-34 on 880823
ML20151R5391988-08-0808 August 1988
Summary of 880623 Meeting W/Mark III Containment Hydrogen Control Owners Group Re Emergency Procedure Guidelines. Resolution of Issues Listed
ML20151Q8131988-08-0303 August 1988
Summary of Operating Reactors Events Meeting 88-031 on 880802.Viewgraphs & List of Attendees Encl
1996-11-05
[Table view]
Category:MEETING SUMMARIES-INTERNAL (NON-TRANSCRIPT)
MONTHYEARML20035B4531993-03-18018 March 1993
Summary of Operator Reactors Events Briefing 93-10 on 930317.List of Attendees Encl
ML20011F6111990-02-28028 February 1990
Summary of Operating Reactors Events Meeting 90-05 on 900228
ML20006E7251990-02-12012 February 1990
Summary of Operating Reactors Events Meeting 90-03 on 900207.List of Attendees & Viewgraphs Encl
ML20005E8421989-12-27027 December 1989
Summary of Operating Reactor Events Meeting 89-045 on 891227.List of Attendees & Significant Elements Discussed Encl
ML20005D8121989-12-18018 December 1989
Summary of Operating Reactors Events Meeting 89-044 on 891213.List of Attendees & Viewgraphs Encl
ML19332G0601989-12-0707 December 1989
Summary of Operating Reactors Events Meeting 89-43 on 891206.On 891128,high Cycle Fatigue Failure of Master Connecting Rod Assembly Occurred at South Texas,Unit 2.RHR Leakage Noted on 891201 at Braidwood,Unit 1
ML20247R0161989-09-21021 September 1989
Summary of Operating Reactors Events Meeting 89-34 on 890920 to Brief Senior Managers & Regional Offices on Selected Events That Occured Since Last Meeting
ML20247E3641989-09-0606 September 1989
Summary of 890717 Meeting W/Numarc,B&W Owners Group & Representatives of Lead Plants Re Status of STS Amends & Outstanding Issues Associated W/Lead Plant STS Submittals
ML20247D5291989-09-0505 September 1989
Summary of Operating Reactors Events Meeting 89-31 on 890830.Significant Event for Input Into NRC Performance Indicator Program Identified
ML20246K2171989-08-24024 August 1989
Summary of Operating Reactors Events Meeting 89-30 on 890823 Re Reactor Trip W/Multiple Instrumentation & Equipment Failures at DC Cook Unit 2 on 890814 & Auxiliary Feedwater Flows at Hb Robinson
ML20245F9261989-08-0707 August 1989
Summary of 890613-15 Meetings W/Util in San Francisco,Ca Re PRA long-term Seismic Program.List of Attendees & Agenda Encl
ML20245G5421989-08-0303 August 1989
Summary of Operating Reactors Events Meeting 89-28 on 890802.List of Attendees,Events Discussed & Significant Elements of Events & Summaries of Reactor Scrams for Wks Ending 890723 & 30 Encl
ML20248B5171989-08-0303 August 1989
Summary of 890725 Interface Meeting W/Util in Birrmingham,Al Re Sonopco/Util Corporate Organization Including Generic Activities & Initiatives Re Plants.Agenda & Viewgraphs Encl
ML20246P7771989-07-13013 July 1989
Summary of Operating Reactors Events Meeting 89-26 on 890712.Events Discussed & Significant Elements of Events Presented in Encl 2.List of Attendees Also Encl
ML20246F8691989-06-22022 June 1989
Summary of Operating Reactors Events Meeting 89-24 on 890621.On 890615,potential Unmonitored Primary Coolant Release Path to Environ Discovered at WPPSS-2.On 890617,loss of Offsite Power Occurred at Brunswick,Unit 2
ML20245G6411989-06-15015 June 1989
Summary of Operating Reactors Events Meeting 89-23 on 890614.On 890607,multiple Electrical Distribution Sys Problems Occurred at Oconee,Units 1,2 & 3.On 890610,unit Power Signal Caused Scram
ML20245F2221989-06-0808 June 1989
Summary of Operating Reactors Events Meeting 89-21 on 890531.List of Attendees & Related Info Encl
ML20245A3851989-05-30030 May 1989
Summary of Operating Reactors Events Meeting 89-20 on 890524.List of Meeting Attendees & Viewgraphs Encl
ML20247M7961989-05-24024 May 1989
Summary of 890502 Meeting W/Util,Sargent & Lundy & Rl Cloud Assoc in Rockville,Md Re Nonlinear Piping Analyses Used to Justify Removal of Snubbers & Pipe Supports.List of Attendees & Presentation by Licensee & Contractors Encl
ML20247K0901989-05-23023 May 1989
Summary of 890517 Meeting W/Inpo Re Similarities & Differences Between Performance Indicator Programs.Detailed Discussion Encl
ML20247J7051989-05-19019 May 1989
Summary of 890501 Meeting w/C-E Owners Group in Rockville,Md Re Diverse Emergency Feedwater Actuation Sys,Per 10CFR50.62 Requirements.List of Meeting Attendees & Viewgraphs Encl. Record Copy
ML20247J6991989-05-19019 May 1989
Summary of 890501 Meeting w/C-E Owners Group in Rockville,Md Re Diverse Emergency Feedwater Actuation Sys,Per 10CFR50.62 Requirements.List of Meeting Attendees & Viewgraphs Encl
ML20247K1011989-05-16016 May 1989
Summary of 890517 Meeting W/Inpo in Bethesda,Md Re Similarities & Differences Between INPO & NRC Performance Indicators
ML20247D3441989-05-16016 May 1989
Summary of Operating Reactors Events Meeting 89-19 on 890510.List of Attendees,Events Discussed & Significant Elements of Events & Rept of long-term Followup Assignments & Summary of Scrams for Wk Ending 890507 Encl
ML20246L7281989-05-0505 May 1989
Summary of 890503 Meeting W/Util in Rockville,Md Re Containment Vessel Structural Integrity Tech Specs for Plants.List of Attendees & Licensee Presentation Encl
ML20246C3261989-05-0404 May 1989
Summary of Operating Reactors Events Meeting 89-18 on 890503
ML20246B5161989-04-28028 April 1989
Summary of 890419 Operating Reactors Events Meeting 89-16. List of Attendees & Handouts Encl
ML20248K3761989-04-10010 April 1989
Summary of Operating Reactors Events Meeting 89-014 on 890405.List of Attendees,Events Discussed & Significant Elements of Events & Summary of Reactor Scrams for Wk Ending 890402 Encl
ML20247F1991989-03-24024 March 1989
Summary of Operating Reactors Events Meeting 89-12 on 890322.List of Attendees,Events Discussed & Significant Elements,Summary of Reactor Scrams & Comparison of Weekly Statistics W/Industry Averages for Wk Ending 890319 Encl
ML20247A8971989-03-16016 March 1989
Summary of Operating Reactors Events Meeting 89-11 on 890315.List of Attendees,Events Discussed & Significant Elements of Events & Four Events Identified for Input to NRC Performance Indicator Program & Summary of Scrams Encl
ML20246N9201989-03-16016 March 1989
Summary of Operating Reactors Events Meeting 89-010 on 890308.List of Attendees,Significant Events Identified for Input to NRC Performance Indicator Program & Summary of Reactor Scrams for Wk Ending 890305 Encl
ML20245H8011989-02-23023 February 1989
Summary of Operating Reactors Events Meeting 89-08 on 890222.Attendee List & Events Discussed & Significant Elements of Events Encl
ML20235M1671989-02-17017 February 1989
Summary of Operating Reactors Events Meeting 89-07 on 890215.List of Attendees,List of Events Discussed,Summary of Events for Long Term Followup or Input to NRC Performance Indicator Program & Summary of Reactor Scrams Encl
ML20196B9821988-12-0101 December 1988
Summary of Operating Reactors Events Meeting 88-47 on 881129.List of Attendees,Events Discussed & Significant Elements of Events,Two Events Suggested for long-term Followup & Summary of Reactor Scrams Encl
ML20195H0271988-11-25025 November 1988
Summary of Operating Reactor Events Meeting 88-46 on 881122
ML20206L9831988-11-25025 November 1988
Summary of Operating Reactors Events Meeting 88-45 on 881115.List of Attendees & Handouts Encl
ML20206E3591988-11-10010 November 1988
Summary of Operating Reactors Events Meeting 88-44 on 881108.List of Meeting Attendees,Significant Events & Summary of Reactor Scrams Encl.One Significant Event Identified for Input to Performance Indicator Program
ML20205H7521988-10-18018 October 1988
Summary of Operating Reactors Events Meeting 88-41 on 881018.No Significant Events Identified for Input to NRC Performance Indicator Program
ML20207M0771988-10-0505 October 1988
Summary of Operating Reactors Events Meeting 88-39 on 881004.List of Attendees & Viewgraphs Encl
ML20207K9461988-10-0404 October 1988
Summary of 880830 Meeting W/Util in Rockville,Md Re Fire protection-related Issues.Draft Fire Protection Engineering Evaluation, Cables on Svc Bldg Outside Wall & List of Attendees Encl
ML20245D8411988-09-28028 September 1988
Summary of Operating Reactors Events Meeting 88-38 on 880927 Re Events Which Occurred Since Last Meeting on 880920
ML20155B8231988-09-20020 September 1988
Summary of Operating Reactors Events Meeting 88-37 on 880920.Info Encl Includes rept-to-date of long-term Followup Assignments & Summary of Reactor Scrams
ML20154F7971988-09-15015 September 1988
Summary of 880901 QA Meeting W/Util in Rockville,Md to Discuss Rev 2 of Util Operational QA Plan for Plants.Agenda & List of Participants Encl
ML20154N4471988-09-0707 September 1988
Summary of Operating Reactors Events Meeting 88-036 on 880906 Re Events Which Occurred Since Last Meeting on 880830.List of Attendees Encl
ML20153G6331988-08-30030 August 1988
Summary of Operating Reactor Events Meeting 88-35 on 880830, Including Summary of Reactor Scrams for Wk Ending 880828. Significant Event Identified for Input to NRC Performenance Indicator Program
ML20153C1861988-08-23023 August 1988
Summary of Operating Reactors Events Meeting 88-34 on 880823
ML20151R5391988-08-0808 August 1988
Summary of 880623 Meeting W/Mark III Containment Hydrogen Control Owners Group Re Emergency Procedure Guidelines. Resolution of Issues Listed
ML20151Q8131988-08-0303 August 1988
Summary of Operating Reactors Events Meeting 88-031 on 880802.Viewgraphs & List of Attendees Encl
ML20207E2961988-07-28028 July 1988
Summary of 880714 Meeting W/B&W Owners Group Re Industry & NRC Actions to Resolve Issues Raised in Generic Ltr 87-12. List of Attendees,Viewgraphs & B&W Design Differences Encl
ML20151N0521988-07-26026 July 1988
Summary of Operating Reactors Events Meeting 88-30 on 880726.List of Attendees & Summary of Reactor Scrams Encl
1993-03-18
[Table view] |
Text
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FEB. 2 41975
/
DOCKET NOS:
50- 27S AND 50-323 APPLICAhT: PACIFIC GAS AND ELECTRIC CCHPNiY (ICSE)
FACIIIN: DIABLD CANYON NUCLEAR POWER STATION, UNITS 1 MlD 2 Sikt1ARY OF MEETING HELD ON FEBRUARY 7,1975 TO DISWSS GDOIDGY R4D SEISTOIIXsY OF 'HE DIABID CANYON SITE On February 7,1975, members of the Regulatory staff and its cormultant, the U. S. Geological Survey (USGS) met with p=e==1 frun IGSE and their consultants in Bethesda, Maryland. An intervenor, the San Luis Obispo Mothers fx Peace, was also re1 resented at the meeting. A canplete list of attendees is attached as Enclosure No.1.
The purpose of the meeting was to discuss the geology and seismology of the D4ahin Canyon site.
Backgruand Following the Construction Pennit (CP) review, Diablo Canyon was des,tgned for a horizontal ground accelenstion of 0.4g.
Since that time additional peacu gaalng4n=1 investigations have taken place offshore of the Diablo Canyon site. In November,1974, PGSE subnitted additional geological infonnation based'en these inves*4=*4ans. In December, 1974, PGSE subnitted, at the Regulatry staff's request, the results of analyses indicating that Diablo Canyon could withstand accelerations of 0.5g.
On January 28, 1975, USGS ocupleted its zwview of the geological inferination and oopeludad that, with the limit of gresent infonnation, an accelsnation of 0.5g was not adequate. This conclusion was based on their opinion that the ma4=nic potential of the Hosgri Fault zone nust be cocaidared the same as that of other basin bounding faults in the region.
Diacnamion PGSE's geology consultant, D. Hamilton, graded the following views on the Hoegri Fault mone: at the northern and the Hosgri Fault zone tenninates a little north of Point Estere, giving way to folded structures and short faults. 'It is rot connected with the San Simeon fault, as evidanood by the apparent trend of the San Simeon fault and the fact that the San Simeon fault is rot seen on seisnic profiles in that area.
M 4mo, 4-t 060023C441 860801 PDR FOIA PCR HOUGH 86-M1
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FEB. 2 41975
. At its southern end the Ibsgri Fault zone is constrained by Transverse Range folding and faulting which ir=Wate that it runs no further south.
There is evidence of recent activity on the Hosgri Fault zone.
Source mechanisms do not preclude a strike slip mechanisn 1:ut total strike slip motion is not likely, at least rot over lorg sections of fault.
'Ihe Ibsgri Fault zone is considered to be a lesser order fault of the plate boundary tectonic zone and represents a lesser order of seismic potential than the Santa incia Bank Fault, basal in part upon the strong topographic expression of the Santa Lucia Bank. The zone consists of 50 - 60 miles of faults which are continuous or armrv,ed in close echelon. With an apprtrximately 30 additional miles of discontiraxxis faulting, the overall lergth is approximately 90 miles.
The URsS representatives stated that it is important to understand the liosgri Fault zone in relationship to regional tectonic mechanisms.
It would be useful to know whether or not there has been great lorizontal movement along the zone.
It is also iar a kuit to evaluate r
the Ibsgri Fault zone in comparison to the Santa Incia Bark Fault.
It is possible that the strurger topogmphic expre:sion of the Santa Lucia Bank is due to less exposure to erosion and deposition.
'D. Ilamilton also ' discussed his views on the fracwork of regional tectenic motions. The first order of faults are the San Andreas Fault IMMew and its pruninent loanches Giayward. Calvares, Elsinore and San Jacinto). The next order would be large onshore faults such as Sur-Macimiento. The Santa incia Bank Fault with a 65 mile outcrop,
, f.)
possibly a length of 85 or 90 miles and possibly a source of the l
1927 earthquake uvuld be ranked with these larrer onslere faults.
l
'Ihe liosgri Fault zone would be ranked with a leeser order such as l
West liausna and Edna.
RISE's seisnelogy consultant, S. Snith, discussed the location and
- ragnitude of the 1927 event. This event has been located by Byerly, banks and Gothrup at different places using different techniques.
Saith presented a location based on many obse:vations of S-P intervals frun aftershocks which locate the event on arcs around Santa Parbara ard Pasedena. Isoseismal data were then used to fix an appropriate latitude. Smith also stated that, in his opinion, 7.25 is a good value for the magnitude of this event.
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FEB.,2 41g75 3-Regartling the maximum fraction of a fault which is likely to move in a single event, Snith stated that large fractions have been observed to move, but not associated with a strike slip mechanism. The data am confused by variations in the manner of detennining fault length.
In nannal app 14mtions, fault lengths are not extended unless them is evidence to do so. However, for nuclear licensing applications i
conservatively long fault lengths am used. Smith believes that the probable caxinun fraction would be 20-25%, based on the fault lengths used in nuclear licensing, at least for strike slip mechanisms.
However, there are not many data on this since fault lengths are not nomally detemined in this manner.
D. hanilton aGain discussed the ordering of faults in the San Andreas system. He stated that the large onshore faults showing large movement in the geologic recorti should be considered capable of magnitude 7 plus. 'Ihe next lesser atter not showing large disp 1-nts ard with no geomorphic expmssion of large motion should be considered capable 6f less.
S. Snith expmssed his opinion that this lesser artier should be considemd capable of one artier of magnitude less energy release.
l
'Ihe staff and USGS p=auel ex;ressed an intemst in the following question: if a higher order fault such as Haywarti were located offshore, would it show surface ex;ression?
D. Hamilton stated that there is i
one such fault which does show good surface expression.
Conclusion The Regulatory staff and USGS requested IGSE to provide the following Mditional infonnation:
(1)
Discussion and arguments for detemining the maximum earthquake 1
i that can be expected on faults of various ranks within the San Andreas systen, m1ated to hiLtric seismicity.
(2) h==ntation on the intersection of the Hoogri Fault zone with the Transverse Range Faults, includiJg seismic reflection profiles.
.(3)
>kre deti41M infomation on.the northern reaches of the Hosgri Fault zone, includire seisaic reflection profiles.
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FEB. 2 41975 t
4 (4)
A fuller developnent of views on the structural relationship of the hosgri Fault zone to the San Simeon Fault.
(5)
Data on the location of the 1927 event.
Original Signed by Thomas J. Hirons j
P. Allison
~
Light Water Reactors Project Branch 1-3 Division of Reactor Licensing Erclosure:
Atterxiance List j
oc w/ encl:
Mr. John C. Mxcissey Philip A. Crane, Jr., Esq.
Andrei J. Skaff, Esq.
Mr. Frederick Eissler Ms. T'14=hath E. Apfelberg Ms. Sandra A. Silver Mr. John Forster Mr. Imnie Valentine n.._d Mr. W4114= P. Oormell Mr. W. J. Lirdbl=1 i
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DJCLOSURE hD.1 ATIENDANCE LIST PACIFIC GAS AND ELECTRIC MEETING FEBRUARY 7, 1975 PACIFIC GAS AND ELECTRIC COMPANY R. B. Bettinger V. J. Ghio W. J. Lindblad USGS J. F. Devine F. A. Houser CONSULTANTS TO FGSE D. H. Hamilton (Earth Science Associates)
S. W. Srnith (University of Washington)
INTERVENOR R. Augustine - Representing San Luis Ms Obispo Mothers for Peace (observing but not participating)
NRC - STAFF D. P. All hon R. Black R. C. DeYoung W. P. (u' m ill R. Hoffman R. B. McMullen
- 0. D. Parr W. Ross J. Tourte11otte e
l' i
Fotn tsi-sat htD7
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Distribution:
Docket File (2 R. Tedesco NRC PDR (2)
V. Stello local PDR R. Maccary NRR Raading (M. Groff)
H. Denton R. C. DeYoung V. Benaroya V. A. Moore C. Long D. Skovholt J. Kastner D. Muller G. Iainas R. Denise D. Ross K. Goller T. Ippolito G. Lear J. Knight W. Butler S. Pawlicki J. Stolz L. Shao R. Clark B. Grimes T. Spies W. * = ill D. Vasu11n R. M11ard K. Kniel P. Fine
- 0. Parr T. Novak.
A. Schwencer M. Spangler R. Schenel EP Project Manager - W. Ross D. Zisenn Attorney, ELD P. Collins IE (3)
~
R. Purple V. H. Wilson G. Knighton ACRS (12)
G. Dicker Project Manager - T. J. Hirons g
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IRR 1-3 File R. Vollmer D. P. Allison W. Houston R. Black S. Varga R. Hoffman R. W. Klecker R. B. McMullen F. Schroeder J. Tourtellotte C. Stepp 4
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/ a E 031975 efL-J R. R. Maccary, Assistant Director for Engineering Division of Technical Review AREAS OF CONCERN IN SEISMIC ANALYSIS AND DESIGN ON DIABLO CANYON In a recent ACRS Subcomittee meeting (February 18, 1975) on Diablo Canyon plant, the subject of conservatism in the seismic design o'f the plant came up again.
It appears that the ACRS members attach a lot of importance to seismic analysis and design. At the meeting Dr. D. Okrent and Dr. S. H. ~ Bush of the ACRS Comittee wem present.
In addition they were accompanied by six seismic consultants - Dr. Page. Dr. Koffman, Dr. Steinbrugge, Dr. Thompson.
l Dr. Siegel and Dr. Triftnac. Considerable emphasis was placed by of the ACRS members on the types of detailed analyses and i
I its perfomed by the staff to verify the adequacy of the seismic sign.
I pointed out to the members of the Comittee that the staff reviews and evaluates procedures, methods of analysis, I
modelling and criteria, but we do not perform a detailed checking or audit of the applicant's analysis.
I also mentioned that in l
order to perform a detailed audit, the Structural Engineering Branch would require a staff of over a hundred people
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A large number of questions on seismic analysis and design wem asked by the ACRS Subconunittee members and their consultants.
All of these questions were answered by the staff to their satis-faction. However, after a caucus of the ACRS Subcommittee, they I
requested additional infomation on a few topics to be cddmssed i
by the applicant and the staff at the May ACRS meeting on the Diablo Canyon plant. These topics are as follows.
1 (1) The Conedttee members would like to know wh&t kind of errors could arise in seismic analysis. They would like to know, for example. if the finite element method nay have errors l
because of wrong input or the methodology itself may have i
errors which fail to cancel but which may accumulate in one direction. They would also like to know if we could estimate l
all possible sources of errors.
(2) The Committee members referred to Appendix X (on Design Adequecy) of Reactor Safety Study WASH 1400 and pointed out thaQr
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-2 p 03 m 19% of the items considered for seismic evaluation, design adequacy could not be ascertained because sufficient infor-mation was not available. They wanted to know whether the j
staff is performing similar type of audit and verification as was done in WASH 1400. They also wanted to know how the staff evaluates whether the seismic analysis and design is l
adequate and what type of audit the staff performs.
(3) They also wanted to know whether differential movement between adjacent structures was considered for the two earthquakes for which the seismic design was checked.
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addition they wanted to know why the two earthquakes are adequate to define the seismic risk at the site.
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Topic (1) will be addressed by the SEB, topic (2) should be addressed jointly by the MEB and SEB while topic (3) should be handled by the SEB and SAB.
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As regards topic (2), a phone call to Franklin Institute revealed that' the type of audit and verification documented in WASH 1400 i
l Appendix X. required approximately 10 man-years in addition to the manpower spent by the Architect Engineers and Vendors.
L. C. S a Chief Structural Engineering Branch
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